Walk along a beach in Tofino and you’ll likely find piles of kelp tangled along the shoreline, enormous logs scattered across the sand, and smaller pieces of wood weathered smooth by the Pacific. After a winter storm, these natural materials can cover large stretches of beach.
It might look like debris left behind by the ocean, but kelp and driftwood play an important role in keeping coastal ecosystems healthy. They provide food and shelter for wildlife, move nutrients between the ocean and land, and help shape the beaches we know and love.
In Clayoquot Sound, where temperate rainforests meet the Pacific Ocean, even the simplest things washed ashore have a part to play in the larger ecosystem.
Kelp
Kelp is one of the most productive forms of marine vegetation on the Pacific coast. Growing in underwater forests, it provides food, shelter and nursery habitat for a wide variety of marine life, from invertebrates to fish.
But kelp’s role doesn’t end when it breaks free from the seafloor.
Waves, currents and storms carry detached kelp toward shore, where it accumulates in piles known as beach wrack. These deposits are an important source of food and nutrients for life on the beach.
As kelp begins to break down, bacteria, fungi and small invertebrates feed on the decaying material. Tiny beach-dwelling crustaceans, including amphipods, help break it down further, making its nutrients available to other organisms. These small creatures can then become food for shorebirds and other coastal wildlife.
In this way, kelp that grows in the ocean can help sustain life on land. Nutrients produced in one ecosystem are transported into another, connecting the underwater world with the shoreline.
Research on Pacific coast beaches has shown that the amount of kelp washing ashore can influence the abundance of beach invertebrates and the food available to other animals. What looks like a simple pile of seaweed is actually an important part of the coastal food web.
Driftwood
Like kelp, driftwood often begins its journey somewhere else. Trees and branches can enter rivers and streams before making their way to the ocean, while coastal trees may fall directly into the water. Currents, tides and waves can then carry this wood along the shoreline.
Over time, saltwater, sand and repeated wave action strip away bark, smooth rough edges and transform fallen trees into the familiar logs found on Tofino’s beaches.
But driftwood is more than a product of coastal weathering. It can also create habitat.
Logs provide shelter for insects, spiders and other small organisms, offering places to hide from predators and protection from harsh environmental conditions. As wood gradually decomposes, fungi and other organisms help break it down, returning organic matter and nutrients to the surrounding environment.
Large logs can also influence the physical structure of a beach. By interrupting wind and wave movement, they can trap sand and organic material in some locations, helping create small differences in the shoreline’s surface and habitat.
The ecological role of driftwood varies depending on where it settles and the conditions around it. Still, across many coastal environments, fallen wood is an important natural feature rather than simply something to be cleared away.
Where the Ocean Meets the Land
One of the most interesting things about kelp and driftwood is what they reveal about the connections between ecosystems. We often think of the ocean, beaches and forests as separate environments. In reality, materials are constantly moving between them.
Kelp transfers marine nutrients onto the shoreline. Driftwood can travel from forests and rivers into coastal waters before returning to beaches. Once there, both materials can support organisms that live outside the environments where they originated.
These connections help explain why coastal ecosystems depend on more than what happens within their immediate boundaries.
In Clayoquot Sound, the relationship between land and sea is especially visible. Rainforests, rivers, estuaries and the Pacific shoreline form part of a connected natural system. The materials that wash ashore offer a small but tangible example of how that system works.
Why Leaving Natural Materials on the Beach Matters
When we see piles of kelp or driftwood, it can be tempting to think of them as something that needs to be cleaned up. But removing natural materials can also remove food, shelter and nutrients that local ecosystems rely on.
Where it is safe and appropriate to do so, leaving kelp and driftwood where they naturally accumulate helps preserve these ecological functions. It also allows the shoreline to continue changing through the processes that have shaped coastal environments for thousands of years.
That doesn’t mean everything found on a beach should be left behind. Plastic, abandoned fishing gear and other human-made debris can harm wildlife and should be handled responsibly. A beach can look messy to us while still supporting a healthy ecosystem.
The next time you visit a beach in Tofino, take a closer look at what the tide has left behind. Notice the kelp tangled between the logs, the small organisms living among the seaweed, and the way driftwood changes the shape of the sand around it.
These details are easy to overlook, but they tell a bigger story about the coast.